Bash GUI for QPDF (using Python)

 

Step 1: Create a python program called mergePDF.py

import PySimpleGUIQt as sg
import sys
import os 

arg = sys.argv[1:] 

current_working_directory = os.getcwd() + "/undefined.pdf"
current_working_directory = "/home/max/Scrivania" + "/undefined.pdf"


class Listbox(sg.Listbox):

    def dragEnterEvent(self, e):
        e.accept()

    def dragMoveEvent(self, e):
        e.accept()

    def dropEvent(self, e):
        data = window['LISTBOX'].get_list_values()
        items = [str(v).replace("PySide2.QtCore.QUrl('file://", "").replace("')", "") for v in e.mimeData().urls()]
        for x in items:
          if (x[-4:].upper() != '.PDF'): items.remove(x)        
        data.extend(items)
        window['LISTBOX'].update(data)
        window.refresh()

    def enable_drop(self):
        self.Widget.setAcceptDrops(True)
        self.Widget.dragEnterEvent = self.dragEnterEvent
        self.Widget.dragMoveEvent = self.dragMoveEvent
        self.Widget.dropEvent = self.dropEvent
        
file_list_column = [
     [ 
        Listbox(arg, size=(50, 10), enable_events=True, key='LISTBOX', select_mode="single"), 
     ],
     [
        sg.Input(default_text=current_working_directory, key='FOLDER')
     ],       
]

image_button_move_column = [  
   [sg.Button("Up")],
   [sg.Button("Down")],
   [sg.Button("Delete")],  
]
       

image_button_action_column = [
   [
      sg.Button("Merge")
   ],
]

layout = [
   [
        sg.Column(file_list_column),
        sg.VSeperator(),
        sg.Column(image_button_move_column),
        sg.VSeperator(),
        sg.Column(image_button_action_column),
   ]
]   

window = sg.Window("pdfMerge V1.0", layout, finalize=True, resizable=False)
window['LISTBOX'].enable_drop()

def retreive_elem_selected(element):
    if element['LISTBOX']: 
       item = element['LISTBOX'][0]
    else: item = ""    
    return item      


def manage_up(item, mylist):
    if item:
       pos = mylist.index(item)
       newpos = pos-1
       if newpos>-1:
          mylist.insert(
             newpos,
             mylist.pop(pos)
            )  
    return mylist
       
def manage_down(item, mylist):
    if item:
       pos = mylist.index(item)
       newpos = pos+1
       mylist.insert(
             newpos,
             mylist.pop(pos)
            )  
    return mylist       
       

def manage_delete(item, mylist):
    if item:
       mylist.remove(item)
    return mylist 
    
def manage_merge(mylist,myfile):
    if myfile:
       str1 = " ".join(str("\""+x+"\"") for x in mylist) 
       os.system("qpdf --empty --pages "+ str1 + " -- " + myfile)  
    else: sg.popup('','The output field is empty') 
    
while True:

    event, values = window.read()
    
    item_selected = retreive_elem_selected(values)
    mylist = window['LISTBOX'].get_list_values()
    
    if event == sg.WINDOW_CLOSED:
       break
        
    if event == 'Merge':
       manage_merge(mylist,window['FOLDER'].get())    
       
    if event == 'Up':
       window['LISTBOX'].update(manage_up(item_selected,mylist))
       window['LISTBOX'].set_value(item_selected)
             
    if event == 'Down':
       window['LISTBOX'].update(manage_down(item_selected,mylist))
       window['LISTBOX'].set_value(item_selected)
       
    if event == 'Delete': 
       if item_selected:
          pos = mylist.index(item_selected)
          window['LISTBOX'].update(manage_delete(item_selected,mylist))
          mylist = window['LISTBOX'].get_list_values()
          if mylist:
             if pos < len(mylist): 
                window['LISTBOX'].set_value(mylist[pos])
             else: window['LISTBOX'].set_value(mylist[-1:])                    

   
    
window.close()
  

Step 2:  create a bash file mergePDF.sh to run the mergePDF.py

#!/bin/bash
python3 /home/max/batfile/Py/mergePDF.py "$@"
  

where /home/max/batfile/Py/ is the path where your python file is stored

Step 3:  create a link of mergePDF.sh file into scripts folder

    in my case into /home/max/.local/share/nautilus/scripts